An oxygen concentrator with a pressure regulating mechanism

Abstract

The present application discloses an oxygen concentrator with a pressure regulating mechanism, which relates to the technical field of oxygen concentrators, including a housing, a compressor, a filter assembly, and an oxygen tank, wherein an outlet pipe is connected to the housing, a pressure regulating mechanism is arranged between the outlet pipe and the oxygen tank, and the outlet pipe and the oxygen tank are connected through the pressure regulating mechanism; the pressure regulating assembly includes a temporary storage tank and a pressure relief tank sliding in the temporary storage tank, a connecting pipe penetrating the temporary storage tank is arranged at one end of the oxygen tank, one end of the connecting pipe passes through the pressure relief tank and is located in the pressure relief tank, and the pressure relief tank and the outlet pipe are connected; a plurality of vents are arranged on the side wall of the pressure relief tank, a closing member for opening and closing the plurality of vents is slidingly arranged on the pressure relief tank, a driving member is arranged on the inner wall of the temporary storage tank, and the driving member is used to gradually open the vents; the temporary storage tank is connected with a guide pipe, and the guide pipe is used to transport gas to the filter assembly. The present application has the effect of reducing the large changes in oxygen output and oxygen output pressure caused by large changes in the pressure of the oxygen cylinder at the outlet end.

Description

Technical Field

[0001] The present application relates to the technical field of oxygen concentrators, and in particular to an oxygen concentrator with a pressure regulating mechanism. Background Art

[0002] Currently, the common oxygen generators on the market are divided into two types according to their principles. One is to use molecular sieves to produce oxygen, and the other is to use "oxygen-attached membrane" also known as "oxygen-enriched membrane" to produce oxygen.

[0003] Among them, the molecular sieve oxygen generator is a molecular sieve that is used intermittently in two cycles. It can adsorb nitrogen in the air when pressurized, and the remaining unabsorbed oxygen is collected and becomes high-purity oxygen after purification.

[0004] Oxygen generators in the related art, such as the molecular sieve oxygen generator disclosed in the Chinese patent document with authorization announcement number CN217600377U, usually use oxygen cylinders to temporarily store oxygen, and the air inlet end of the oxygen cylinder is connected to the common air outlet end of the two molecular sieves, and the air outlet end of the oxygen cylinder is connected to the air supply pipeline. When a power outage or the oxygen generator fails or the oxygen production efficiency is adjusted, the pressure of the oxygen cylinder is likely to change, resulting in large changes in the oxygen output and oxygen output pressure of the air supply pipeline, which is likely to affect the user. Summary of the invention

[0005] In order to reduce the large changes in oxygen output and oxygen output pressure caused by large changes in the pressure of the oxygen cylinder at the outlet end, the present application provides an oxygen concentrator with a pressure regulating mechanism.

[0006] The present application provides an oxygen concentrator with a pressure regulating mechanism, which adopts the following technical solution:

[0007] An oxygen concentrator with a pressure regulating mechanism comprises a housing, and a compressor, a filter assembly, and an oxygen tank which are arranged inside the housing and are connected in sequence, the housing is connected with an air outlet pipe, a pressure regulating mechanism is arranged between the air outlet pipe and the oxygen tank, and the air outlet pipe and the oxygen tank are connected through the pressure regulating mechanism;

[0008] The pressure regulating assembly includes a temporary storage tank and a pressure relief tank slidably arranged in the temporary storage tank, one end of the oxygen tank is provided with a connecting pipe penetrating the outer wall of the temporary storage tank, one end of the connecting pipe passes through the outer wall of the pressure relief tank and is located in the pressure relief tank, and the pressure relief tank is connected to the air outlet pipe;

[0009] The side wall of the pressure relief tank is provided with a plurality of vent holes, the outer wall of the pressure relief tank is slidably provided with a closing member for opening and closing the plurality of vent holes, the inner wall of the temporary storage tank located on a side of the pressure relief tank away from the oxygen tank is provided with a driving member, and the driving member is used to gradually open the vent holes when the pressure relief tank moves in a direction away from the oxygen tank;

[0010] The temporary storage tank is connected to a guide pipe, and the guide pipe is used to transport gas to the filter assembly.

[0011] By adopting the above technical scheme, the air entering the shell can be filtered by the filter assembly, enter the oxygen tank, and then be discharged from the outlet pipe after passing through the pressure regulating mechanism; when the pressure of the oxygen discharged from the oxygen tank is relatively high, it can push the pressure relief tank to move, and the overlapping part of the connecting pipe and the pressure relief tank is reduced, thereby increasing the oxygen storage space, thereby playing a role in pressure relief; if the pressure is still relatively high at this time, the driving member drives the closing member to move to open multiple vents at the same time, and the air with high oxygen content in the pressure relief tank is discharged from the vents to the temporary storage tank, and the gas in the temporary storage tank is pushed back to the filter assembly through the guide pipe for filtration again, forming a cycle, thereby reducing the pressure of the pressure relief tank, so that the pressure of the air discharged from the outlet pipe connected to the pressure relief tank can be reduced.

[0012] Optionally, the guide tube is provided with a flow meter for detecting the flow velocity of the airflow in the guide tube, or the guide tube is provided with a pressure gauge for detecting the air pressure in the guide tube.

[0013] By adopting the above technical solution, by setting a flow meter or a pressure gauge, it is possible to detect whether there is airflow passing through the guide pipe, so as to promptly discover whether the output pressure of the oxygen tank is too high and understand the working condition of the pressure regulating mechanism.

[0014] Optionally, the pressure relief tank is located at the top of the oxygen tank, the guide pipe is connected to the top of the temporary storage tank, an air return hole is provided at the bottom of the pressure relief tank, a baffle for opening and closing the air return hole is movably provided at the bottom of the pressure relief tank, and the oxygen generator also includes an air supply source for supplying air to the temporary storage tank.

[0015] By adopting the above technical solution, the mass of oxygen is greater than that of air, and the guide pipe is connected to the top of the temporary storage tank to facilitate the discharge of gas with lower density. The return air hole is set at the bottom of the pressure relief tank to facilitate the recovery of oxygen. When the oxygen production is completed, there is air with a high oxygen content in the temporary storage tank. At this time, the gas is introduced into the temporary storage tank through the air supply source, and the air supply source is closed in time to recover part of the air with a high oxygen content, and the oxygen generator can store more oxygen for use. By setting a baffle, it can be opened or closed when needed. When closed, it can reduce the leakage of air with a high oxygen content, and when opened, it is convenient to recover air with a high oxygen content.

[0016] Optionally, the air supply source is an air pump, the air outlet of the air pump is connected to an air inflation pipe, one end of the air inflation pipe is connected to a three-way reversing valve, the three-way reversing valve is connected to a guide pipe, and is used to control the temporary storage tank to be connected to the air pump or the filter component respectively.

[0017] By adopting the above technical solution, gas is transported by means of an air pump, and by providing a three-way reversing valve, the temporary storage tank can be connected to the filter assembly and the air pump respectively, thereby reducing the impact of the air pump on the filter assembly when passing air into the temporary storage tank, and also facilitating the operator to control the ventilation time of the air pump.

[0018] Optionally, the plurality of vent holes are arranged to form a plurality of parallel rows, the closing member comprises a plurality of closing strips which are parallel and slidably connected to the outer wall of the pressure relief tank, the plurality of closing strips are applied one by one to open and close a row of the vent holes, and the driving member is used to simultaneously drive the plurality of closing strips to move so as to simultaneously open and close the vent holes.

[0019] By adopting the above technical solution, a plurality of vent holes are provided to increase the air discharge rate, thereby achieving the effect of quickly reducing the air supply pressure, and the vent holes are arranged in rows, which makes it convenient to open and close the vent holes in the same row at the same time by moving the closing strip, and the driving member can drive multiple closing strips to move at the same time, thereby achieving further improvement in efficiency.

[0020] Optionally, the driving member includes a driving block arranged on the inner wall of the temporary storage tank, and the closing member also includes a connecting plate connected to the same end of all the closing strips, and when the pressure relief tank moves in a direction away from the oxygen tank, the driving block and the connecting plate abut against each other to make the connecting plate and the pressure relief tank move relative to each other, and an elastic member is arranged between the connecting plate and the pressure relief tank.

[0021] By adopting the above technical solution, when the airflow pushes the pressure relief tank to move, after the connecting plate and the driving block abut against each other, the pressure relief tank continues to move, so that the connecting plate moves relative to the pressure relief tank, so that the closing strip can open and close multiple air holes at the same time, and by setting an elastic member, when the gas pressure in the pressure relief tank is reduced, the connecting plate can be reset by the elastic member, thereby closing the multiple air holes.

[0022] Optionally, the shielding plate is slidably connected to the bottom of the pressure relief tank, and a driving source for driving the shielding plate to move is provided at the bottom of the pressure relief tank.

[0023] By adopting the above technical solution, the shielding plate moves by sliding to open and close the return air hole. When the oxygen production is completed, the return air hole can be opened by starting the driving source to recover air with a higher oxygen content.

[0024] Optionally, the baffle plate is rotatably connected to the inner bottom wall of the pressure relief tank via a rotating shaft, and a torsion spring is provided on the rotating shaft to drive the baffle plate to close the air return hole.

[0025] By adopting the above technical solution, the baffle plate opens and closes the air return hole by rotating, and the baffle plate is arranged inside the pressure relief tank. When oxygen is produced, the air pressure and the elastic force of the torsion spring can drive the baffle plate to close the air hole. When air is supplied through the air supply source, the gas in the temporary storage tank can drive the baffle plate to overcome the resistance of the torsion spring and rotate to open the air hole.

[0026] Optionally, a sealing ring is fixed to the outer wall of the connecting pipe, and the sealing ring is fixed to the outer bottom wall of the pressure relief tank.

[0027] By adopting the above technical solution and providing a sealing ring, it is possible to reduce leakage of airflow in the pressure relief tank and the temporary storage tank from the gap around the connecting pipe.

[0028] In summary, the present application includes at least one of the following beneficial effects:

[0029] 1. When the oxygen pressure discharged from the oxygen tank is high, it can push the pressure relief tank to move, and the overlapping part of the connecting pipe and the pressure relief tank is reduced, thereby increasing the oxygen storage space and playing a role in pressure relief;

[0030] 2. When the pressure is still high, the driving member drives the closing member to move, so as to open multiple vents at the same time, discharge the air with high oxygen content in the pressure relief tank from the vents to the temporary storage tank, and push the gas in the temporary storage tank back to the filter assembly through the guide pipe for further filtration, forming a cycle, thereby reducing the pressure of the pressure relief tank, so that the pressure of the air discharged from the outlet pipe connected to the pressure relief tank can be reduced;

[0031] 3. By setting a pressure gauge or flow meter, you can timely understand the working condition of the pressure regulating mechanism;

[0032] 4. By providing an air supply source, an air blowing pipe, a shielding plate and an air vent, part of the air filtered by the filter assembly can be recovered into the oxygen tank or the air release tank for next use after use. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0034] Figure 2 is a partial schematic diagram of the internal structure of the display housing of Example 1 of the present application;

[0035] Figure 3 is a cross-sectional schematic diagram showing the internal structure of the pressure relief tank and the temporary storage tank of Example 1 of the present application;

[0036] Figure 4 is a partial schematic diagram of the display closure strip structure of Example 1 of the present application;

[0037] Figure 5It is a partial schematic diagram showing the guide tube connection structure of Example 1 of the present application;

[0038] Figure 6 yes Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0039] Figure 7 It is a partial structural schematic diagram showing the connection method of the baffle plate in Example 2 of the present application.

[0040] Explanation of the reference numerals: 1. Shell; 11. Compressor; 12. Filter assembly; 13. Oxygen tank; 131. Connecting pipe; 132. Sealing ring; 133. Inlet pipe; 14. Outlet pipe; 2. Pressure relief tank; 21. Closing piece; 211. Connecting plate; 212. Closing strip; 213. Make way hole; 214. Spring; 22. Return hole; 23. Shielding plate; 231. Torsion spring; 24. Vent hole; 25. Connecting hose; 26. Driving source; 3. Temporary storage tank; 31. Guide pipe; 311. Three-way reversing valve; 312. Measuring meter; 32. Air pipe; 33. Air pump; 34. Driving block. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-7 This application is described in further detail.

[0042] Embodiment 1:

[0043] The oxygen concentrator with a pressure regulating mechanism disclosed in the embodiment of the present application is Figure 1 and Figure 2 An oxygen concentrator with a pressure regulating mechanism includes a housing 1, a compressor 11, a filter assembly 12, an oxygen tank 13 and other components are arranged inside the housing 1, and an air inlet pipe 133 is connected to the air inlet end of the compressor 11, and air can be delivered to the compressor 11 through the air inlet pipe 133. The filter assembly 12 includes two molecular sieves that can be switched for use, and the molecular sieves are connected to the oxygen tank 13 and the compressor 11 through a pipeline. An outlet pipe 14 is also arranged in the housing 1, and air with a high oxygen content (hereinafter referred to as high oxygen air) can be delivered to the patient through the outlet pipe 14, and the outlet pipe 14 is connected to the oxygen tank 13.

[0044] Reference Figure 2 and Figure 3 A pressure regulating mechanism is also provided in the housing 1, and the pressure regulating mechanism is provided at one end of the oxygen tank 13 away from the filter assembly 12. The pressure regulating mechanism includes a temporary storage tank 3 fixed in the housing 1 and located at the top of the oxygen tank 13, and a pressure relief tank 2 vertically sliding in the temporary storage tank 3. A connecting pipe 131 is fixed on the top of the oxygen tank 13, and the connecting pipe 131 penetrates into the temporary storage tank 3. A sealing ring 132 is fixed on the outer wall of the connecting pipe 131 located outside the temporary storage tank 3, and the sealing ring 132 is fixed to the bottom wall of the temporary storage tank 3, thereby reducing the outflow of gas from the gap around the connecting pipe 131.

[0045] The connecting pipe 131 continues to penetrate the pressure relief tank 2, and one end is located in the pressure relief tank 2, so that the high-oxygen air in the oxygen tank 13 can be discharged into the pressure relief tank 2. A connecting hose 25 is connected to the top of the pressure relief tank 2. The connecting hose 25 is connected to the outlet pipe 14 or a subsequent gas processing mechanism, so that the high-oxygen air in the pressure relief tank 2 is discharged for use by the patient. By providing the connecting hose 25, when the pressure relief tank 2 is moved, it can also maintain communication with the outlet pipe 14.

[0046] Reference Figure 3 and Figure 4 A plurality of rows of vent holes 24 are provided on the side wall of the pressure relief tank 2, and each row of vent holes 24 includes a plurality of vent holes 24. A closing member 21 is slidably connected to the outside of the pressure relief tank 2. The closing member 21 includes a connecting plate 211 located at the top of the pressure relief tank 2, and a plurality of closing strips 212. The number of closing strips 212 is consistent with the number of rows of vent holes 24, and the closing strips 212 are slidably connected to the outer wall of the pressure relief tank 2. The closing strips 212 are provided with clearance holes 213 having the same number and position as the vent holes 24 in a row of vent holes 24. When the closing strips 212 slide, the clearance holes 213 can correspond to one vent hole 24 one by one, thereby playing the role of closing and opening a plurality of vent holes 24 at the same time through the closing strips 212. In addition, by providing the connecting plate 211, the connecting plate 211 can drive the plurality of closing strips 212 to move when moving, thereby playing the role of opening and closing all the vent holes 24. In the present application, the pressure relief tank 2 is in the shape of a rectangular parallelepiped, and a row of vent holes 24 are provided on the four side walls of the pressure relief tank 2, and four closing strips 212 are also provided.

[0047] Reference Figure 3 and Figure 5 An elastic member is provided between the connecting plate 211 and the top wall of the pressure relief tank 2, and the elastic member is a spring 214. When the output pressure of the oxygen tank 13 drops, the spring 214 can release the elastic force, and under the action of gravity, the pressure relief tank 2 and the closing strip 212 slide relative to each other, and the clearance hole 213 of the closing strip 212 and the vent 24 are misaligned, so that the vent 24 is closed.

[0048] Reference Figure 3 and Figure 5The top of the temporary storage tank 3 is connected with a guide pipe 31, one end of which is connected with a three-way reversing valve 311, which is a solenoid valve, and one of the other two interfaces is connected with an air blower pipe 32, and the other is connected with the filter assembly 12. When the high-oxygen air enters the temporary storage tank 3 from the vent hole 24, it can drive the airflow in the temporary storage tank 3 to enter the filter assembly 12 from the guide pipe 31, so that the temporary storage tank 3 is filled with high-oxygen air. When the pressure continues to be released, the high-oxygen air can repeatedly enter the filter assembly 12. Since the high-oxygen air has been filtered, the waste of this part of the gas can be reduced, and the excessive power loss caused by repeated filtering of the filter assembly 12 can also be reduced. A measuring meter 312 is connected to the guide pipe 31 or to the pipe connected to the three-way reversing valve 311 and the filter assembly 12 at the same time. The measuring meter 312 is a flow meter for detecting the flow rate of the airflow in the guide pipe 31, or a pressure gauge for detecting the air pressure in the guide pipe 31. The measuring meter 312 can be located outside the shell 1, or the position of the shell 1 corresponding to the measuring meter 312 is transparent for the operator to observe, so as to detect whether there is airflow passing through the guide pipe 31, and timely discover whether the output air pressure of the oxygen tank 13 is too high, and understand the working condition of the pressure regulating mechanism.

[0049] Reference Figure 3 and Figure 6 A plurality of air return holes 22 are provided at the bottom of the pressure relief tank 2. A shielding plate 23 for closing the air return holes 22 is rotatably connected to the inner bottom wall of the pressure relief tank 2 through a hinge shaft, and a torsion spring 231 is provided on the hinge shaft. The shielding plate 23 can close the air return holes 22 when in use through the elasticity of the torsion spring 231 and the gravity of the shielding plate 23. When the high-oxygen air in the temporary storage tank 3 is used or needs to be reused, the air pipe 32 and the guide pipe 31 can be connected through the three-way reversing valve 311, so that the air pump 33 can introduce air into the temporary storage tank 3, and part of the high-oxygen air can push the shielding plate 23 into the pressure relief tank 2 for reuse.

[0050] The implementation principle of an oxygen concentrator with a pressure regulating mechanism in an embodiment of the present application is as follows: when the gas pressure discharged from the oxygen tank 13 is too high, it can push the pressure relief tank 2 to move, and the overlapping part between the connecting pipe 131 and the pressure relief tank 2 is reduced, thereby increasing the oxygen storage space, thereby achieving a pressure relief effect; if the pressure is still high at this time, the connecting plate 211 is pushed to move by the driving block 34, and the closing strip 212 moves so that the clearance hole 213 and the vent hole 24 gradually overlap, so as to open a plurality of vent holes 24 at the same time, and the air with a high oxygen content in the pressure relief tank 2 is discharged from the vent hole 24 into the temporary storage tank 3, and the gas in the temporary storage tank 3 is pushed back to the filter assembly 12 through the guide pipe 31 for filtering again, forming a cycle, thereby reducing the pressure of the pressure relief tank 2, so that the pressure of the air discharged from the outlet pipe 14 connected to the pressure relief tank 2 can be reduced.

[0051] Embodiment 2:

[0052] The difference between the present embodiment and embodiment 1 is that, Figure 7 A plurality of baffles 23 are slidably connected to the bottom of the pressure relief tank 2, and a driving source 26 is fixed to the bottom of the pressure relief tank 2. The driving source 26 is an electric push rod, and a connecting rod is connected to the output shaft. The connecting rod is connected to the plurality of baffles 23 at the same time, so that when the return air hole 22 needs to be used, the operation of the driving source 26 can be controlled by electric control or signal control, so that the plurality of baffles 23 move simultaneously to open the return air hole 22.

[0053] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An oxygen concentrator with a pressure regulating mechanism, comprising a housing (1), and a compressor (11), a filter assembly (12), and an oxygen tank (13) which are arranged inside the housing (1) and are connected in sequence, characterized in that: The housing (1) is connected to an air outlet pipe (14), a pressure regulating mechanism is provided between the air outlet pipe (14) and the oxygen tank (13), and the air outlet pipe (14) and the oxygen tank (13) are connected via the pressure regulating mechanism; The pressure regulating mechanism comprises a temporary storage tank (3) and a pressure relief tank (2) slidably arranged in the temporary storage tank (3); one end of the oxygen tank (13) is provided with a connecting pipe (131) penetrating the outer shell of the temporary storage tank (3); one end of the connecting pipe (131) passes through the outer shell of the pressure relief tank (2) and is located in the pressure relief tank (2); and the pressure relief tank (2) is connected to the air outlet pipe (14); The side wall of the pressure relief tank (2) is provided with a plurality of vent holes (24); the outer wall of the pressure relief tank (2) is slidably provided with a closing member (21) for opening and closing the plurality of vent holes (24); the inner wall of the temporary storage tank (3) located on a side of the pressure relief tank (2) away from the oxygen tank (13) is provided with a driving member, and the driving member is used to gradually open the vent holes (24) when the pressure relief tank (2) moves in a direction away from the oxygen tank (13); The temporary storage tank (3) is connected to a guide pipe (31), and the guide pipe (31) is used to transport gas to the filter assembly (12); The plurality of vent holes (24) are arranged in parallel to form a plurality of rows, the closing member (21) comprises a plurality of closing strips (212) parallel to and slidably connected to the outer wall of the pressure relief tank (2), the plurality of closing strips (212) being used one by one to open and close a row of the vent holes (24), and the driving member being used to simultaneously drive the plurality of closing strips (212) to move so as to simultaneously open and close the vent holes (24); The driving member comprises a driving block (34) arranged on the inner wall of the temporary storage tank (3); the closing member (21) further comprises a connecting plate (211) connected to the same end of all the closing strips (212); when the pressure relief tank (2) moves in a direction away from the oxygen tank (13), the driving block (34) and the connecting plate (211) abut against each other, so that the connecting plate (211) and the pressure relief tank (2) move relative to each other; and an elastic member is arranged between the connecting plate (211) and the pressure relief tank (2).

2. The oxygen concentrator with a pressure regulating mechanism according to claim 1, characterized in that: The guide tube (31) is provided with a flow meter for detecting the flow velocity of the airflow in the guide tube (31), or the guide tube (31) is provided with a pressure meter for detecting the air pressure in the guide tube (31).

3. The oxygen concentrator with a pressure regulating mechanism according to claim 1, characterized in that: The pressure relief tank (2) is located on the top of the oxygen tank (13), the guide pipe (31) is connected to the top of the temporary storage tank (3), a return air hole (22) is provided at the bottom of the pressure relief tank (2), a shielding plate (23) for opening and closing the return air hole (22) is movably provided at the bottom of the pressure relief tank (2), and the oxygen concentrator further comprises an air supply source for supplying air to the temporary storage tank (3).

4. The oxygen concentrator with a pressure regulating mechanism according to claim 3, characterized in that: The air supply source is an air pump (33); an air outlet end of the air pump (33) is connected to an air inflation pipe (32); one end of the air inflation pipe (32) is connected to a three-way reversing valve (311); the three-way reversing valve (311) is connected to the guide pipe (31) and is used to control the temporary storage tank (3) to be connected to the air pump (33) or the filter assembly (12).

5. The oxygen concentrator with a pressure regulating mechanism according to claim 4, characterized in that: The shielding plate (23) is slidably connected to the bottom of the pressure relief tank (2), and a driving source (26) for driving the shielding plate (23) to move is provided at the bottom of the pressure relief tank (2).

6. The oxygen concentrator with a pressure regulating mechanism according to claim 4, characterized in that: The shielding plate (23) is rotatably connected to the inner bottom wall of the pressure relief tank (2) via a hinge shaft, and a torsion spring (231) is provided on the hinge shaft for driving the shielding plate (23) to close the air return hole (22).

7. The oxygen concentrator with a pressure regulating mechanism according to claim 6, characterized in that: A sealing ring (132) is fixed to the outer wall of the connecting pipe (131), and the sealing ring (132) is fixed to the outer bottom wall of the pressure relief tank (2).

Images